Title of article
SEYFERT GALAXIES AND THE HARD X-RAY BACKGROUND: ARTIFICIAL CHANDRA OBSERVATIONS OF z = 0.3 ACTIVE GALAXIES
Author/Authors
Muno، M. P. نويسنده , , Hornschemeier، A. E. نويسنده , , Peterson، K. C. نويسنده , , Gallagher، S. C. نويسنده , , Bullard، E. C. نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
-132
From page
133
To page
0
Abstract
We construct an infinite family of hyperbolic 3manifolds whose fundamental groups are cyclically presented. We prove that these 3-manifolds are cyclic branched coverings of S3 over the 2-bridge knot b (17,4). Finally, we compute thehomology groups and discuss the spines of our manifolds which correspond to some group presentations
Keywords
diffuse backgroundX-rays , SeyfertX-rays , activegalaxies
Journal title
Astronomical Journal
Serial Year
2006
Journal title
Astronomical Journal
Record number
116592
Link To Document